Add the new domain, in this case example.com. Set zimbraVirtualHostName to mail.example.com and zimbraVirtualIPAddress to 1.2.3.4. Make sure the zimbraVirtualHostName is set to the name which will be used to access the domain (URL) and the SSL certificate is signed for the same name. zmprov md example.com zimbraVirtualHostName mail.example.com zimbraVirtualIPAddress 1.2.3.4

I will use letsencrypt.My doubt is: should I get a letsencrypt cert for example.com or for mail.example.com?Or should I get 2 certs, one for example.com and one for mail.example.com?Please advise as I am very confused